Michael Overdorf - 19 Feb 2026 Form 4 Insider Report for Annexon, Inc. (ANNX)

Reporting relationship: EVP & CHIEF BUSINESS OFFICER
Issuer ticker: ANNX
Reported as of: 19 Feb 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 23 Feb 2026, 19:08:42 UTC
Prior SEC filing: 20 Feb 2026
Next SEC filing: 04 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Jennifer Lew, Attorney-in-Fact

Key filing fact

Michael Overdorf filed Form 4 for Annexon, Inc. (ANNX) on 23 Feb 2026.

Key facts

This page summarizes Michael Overdorf's Form 4 filing for Annexon, Inc. (ANNX).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 23 Feb 2026, 19:08.

Change

Previous filing in this sequence was filed on 20 Feb 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001818522 Primary reporting owner

Overdorf Michael

Relationship: EVP & CHIEF BUSINESS OFFICER
Address: C/O ANNEXON, INC, 1400 SIERRA POINT PKWY, BLDG C, STE 200, BRISBANE
Signature: /s/ Jennifer Lew, Attorney-in-Fact
Signature date: 23 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ANNX transaction

Common Stock

Award

Transaction value: $0
Shares: +62,500
Change %: +50%
Price: $0.000000
Shares after: 186,964
Date: 19 Feb 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ANNX transaction Derivative

Stock Option (Right to Buy)

Award

Transaction value: $0
Shares: +250,000
Change %
Price: $0.000000
Shares after: 250,000
Date: 19 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 250,000
Exercise price: $5.10
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Constitute restricted stock units ("RSUs") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. 1/3rd of the RSUs vest annually on February 19 of each year, with the first 1/3rd vesting on February 19, 2027, subject to Reporting Person's continuous service with the Issuer as of each such vesting date.

Footnote F2

1/48th of the shares subject to the option vest on each monthly anniversary measured from February 19, 2026 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date, subject to Reporting Person's continuous service with the Issuer as of each such vesting date.